ifupdowm: shrink
ifupdown_main 2170 2459 +289 find_iface_state 57 56 -1 next_word 63 58 -5 popen2 350 - -350 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 1/2 up/down: 289/-356) Total: -67 bytes
This commit is contained in:
Denis Vlasenko
parent
284d0faed6
commit
1e18f1bab3
@ -590,8 +590,8 @@ static char *next_word(char **buf)
|
||||
/* Skip over leading whitespace */
|
||||
word = skip_whitespace(*buf);
|
||||
|
||||
/* Stop on EOL/comments */
|
||||
if (*word == '#' || *word == '\0')
|
||||
/* Stop on EOL */
|
||||
if (*word == '\0')
|
||||
return NULL;
|
||||
|
||||
/* Find the length of this word (can't be 0) */
|
||||
@ -652,40 +652,67 @@ static const llist_t *find_list_string(const llist_t *list, const char *string)
|
||||
|
||||
static struct interfaces_file_t *read_interfaces(const char *filename)
|
||||
{
|
||||
/* Let's try to be compatible.
|
||||
*
|
||||
* "man 5 interfaces" says:
|
||||
* Lines starting with "#" are ignored. Note that end-of-line
|
||||
* comments are NOT supported, comments must be on a line of their own.
|
||||
* A line may be extended across multiple lines by making
|
||||
* the last character a backslash.
|
||||
*
|
||||
* Seen elsewhere in example config file:
|
||||
* A "#" character in the very first column makes the rest of the line
|
||||
* be ignored. Blank lines are ignored. Lines may be indented freely.
|
||||
* A "\" character at the very end of the line indicates the next line
|
||||
* should be treated as a continuation of the current one.
|
||||
*/
|
||||
#if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
||||
struct mapping_defn_t *currmap = NULL;
|
||||
#endif
|
||||
struct interface_defn_t *currif = NULL;
|
||||
struct interfaces_file_t *defn;
|
||||
FILE *f;
|
||||
char *firstword;
|
||||
char *buf;
|
||||
|
||||
char *first_word;
|
||||
char *rest_of_line;
|
||||
enum { NONE, IFACE, MAPPING } currently_processing = NONE;
|
||||
|
||||
defn = xzalloc(sizeof(struct interfaces_file_t));
|
||||
|
||||
defn = xzalloc(sizeof(*defn));
|
||||
f = xfopen(filename, "r");
|
||||
|
||||
while ((buf = xmalloc_getline(f)) != NULL) {
|
||||
char *buf_ptr = buf;
|
||||
|
||||
firstword = next_word(&buf_ptr);
|
||||
if (firstword == NULL) {
|
||||
#if ENABLE_DESKTOP
|
||||
/* Trailing "\" concatenates lines */
|
||||
char *p;
|
||||
while ((p = last_char_is(buf, '\\')) != NULL) {
|
||||
*p = '\0';
|
||||
rest_of_line = xmalloc_getline(f);
|
||||
if (!rest_of_line)
|
||||
break;
|
||||
p = xasprintf("%s%s", buf, rest_of_line);
|
||||
free(buf);
|
||||
continue; /* blank line */
|
||||
free(rest_of_line);
|
||||
buf = p;
|
||||
}
|
||||
#endif
|
||||
rest_of_line = buf;
|
||||
first_word = next_word(&rest_of_line);
|
||||
if (!first_word || *buf == '#') {
|
||||
free(buf);
|
||||
continue; /* blank/comment line */
|
||||
}
|
||||
|
||||
if (strcmp(firstword, "mapping") == 0) {
|
||||
if (strcmp(first_word, "mapping") == 0) {
|
||||
#if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
||||
currmap = xzalloc(sizeof(*currmap));
|
||||
|
||||
while ((firstword = next_word(&buf_ptr)) != NULL) {
|
||||
while ((first_word = next_word(&rest_of_line)) != NULL) {
|
||||
if (currmap->n_matches >= currmap->max_matches) {
|
||||
currmap->max_matches = currmap->max_matches * 2 + 1;
|
||||
currmap->match = xrealloc(currmap->match, sizeof(*currmap->match) * currmap->max_matches);
|
||||
currmap->match = xrealloc(currmap->match,
|
||||
sizeof(*currmap->match) * currmap->max_matches);
|
||||
}
|
||||
currmap->match[currmap->n_matches++] = xstrdup(firstword);
|
||||
currmap->match[currmap->n_matches++] = xstrdup(first_word);
|
||||
}
|
||||
/*currmap->max_mappings = 0; - done by xzalloc */
|
||||
/*currmap->n_mappings = 0;*/
|
||||
@ -702,7 +729,7 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
|
||||
debug_noise("Added mapping\n");
|
||||
#endif
|
||||
currently_processing = MAPPING;
|
||||
} else if (strcmp(firstword, "iface") == 0) {
|
||||
} else if (strcmp(first_word, "iface") == 0) {
|
||||
static const struct address_family_t *const addr_fams[] = {
|
||||
#if ENABLE_FEATURE_IFUPDOWN_IPV4
|
||||
&addr_inet,
|
||||
@ -712,24 +739,23 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
|
||||
#endif
|
||||
NULL
|
||||
};
|
||||
|
||||
char *iface_name;
|
||||
char *address_family_name;
|
||||
char *method_name;
|
||||
llist_t *iface_list;
|
||||
|
||||
currif = xzalloc(sizeof(*currif));
|
||||
iface_name = next_word(&buf_ptr);
|
||||
address_family_name = next_word(&buf_ptr);
|
||||
method_name = next_word(&buf_ptr);
|
||||
iface_name = next_word(&rest_of_line);
|
||||
address_family_name = next_word(&rest_of_line);
|
||||
method_name = next_word(&rest_of_line);
|
||||
|
||||
if (method_name == NULL)
|
||||
bb_error_msg_and_die("too few parameters for line \"%s\"", buf);
|
||||
|
||||
/* ship any trailing whitespace */
|
||||
buf_ptr = skip_whitespace(buf_ptr);
|
||||
rest_of_line = skip_whitespace(rest_of_line);
|
||||
|
||||
if (buf_ptr[0] != '\0' /* && buf_ptr[0] != '#' */)
|
||||
if (rest_of_line[0] != '\0' /* && rest_of_line[0] != '#' */)
|
||||
bb_error_msg_and_die("too many parameters \"%s\"", buf);
|
||||
|
||||
currif->iface = xstrdup(iface_name);
|
||||
@ -754,57 +780,59 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
|
||||
|
||||
debug_noise("iface %s %s %s\n", currif->iface, address_family_name, method_name);
|
||||
currently_processing = IFACE;
|
||||
} else if (strcmp(firstword, "auto") == 0) {
|
||||
while ((firstword = next_word(&buf_ptr)) != NULL) {
|
||||
} else if (strcmp(first_word, "auto") == 0) {
|
||||
while ((first_word = next_word(&rest_of_line)) != NULL) {
|
||||
|
||||
/* Check the interface isnt already listed */
|
||||
if (find_list_string(defn->autointerfaces, firstword)) {
|
||||
if (find_list_string(defn->autointerfaces, first_word)) {
|
||||
bb_perror_msg_and_die("interface declared auto twice \"%s\"", buf);
|
||||
}
|
||||
|
||||
/* Add the interface to the list */
|
||||
llist_add_to_end(&(defn->autointerfaces), xstrdup(firstword));
|
||||
debug_noise("\nauto %s\n", firstword);
|
||||
llist_add_to_end(&(defn->autointerfaces), xstrdup(first_word));
|
||||
debug_noise("\nauto %s\n", first_word);
|
||||
}
|
||||
currently_processing = NONE;
|
||||
} else {
|
||||
switch (currently_processing) {
|
||||
case IFACE:
|
||||
if (buf_ptr[0] == '\0')
|
||||
if (rest_of_line[0] == '\0')
|
||||
bb_error_msg_and_die("option with empty value \"%s\"", buf);
|
||||
|
||||
if (strcmp(firstword, "up") != 0
|
||||
&& strcmp(firstword, "down") != 0
|
||||
&& strcmp(firstword, "pre-up") != 0
|
||||
&& strcmp(firstword, "post-down") != 0
|
||||
if (strcmp(first_word, "up") != 0
|
||||
&& strcmp(first_word, "down") != 0
|
||||
&& strcmp(first_word, "pre-up") != 0
|
||||
&& strcmp(first_word, "post-down") != 0
|
||||
) {
|
||||
int i;
|
||||
for (i = 0; i < currif->n_options; i++) {
|
||||
if (strcmp(currif->option[i].name, firstword) == 0)
|
||||
if (strcmp(currif->option[i].name, first_word) == 0)
|
||||
bb_error_msg_and_die("duplicate option \"%s\"", buf);
|
||||
}
|
||||
}
|
||||
if (currif->n_options >= currif->max_options) {
|
||||
currif->max_options += 10;
|
||||
currif->option = xrealloc(currif->option, sizeof(*currif->option) * currif->max_options);
|
||||
currif->option = xrealloc(currif->option,
|
||||
sizeof(*currif->option) * currif->max_options);
|
||||
}
|
||||
debug_noise("\t%s=%s\n", firstword, buf_ptr);
|
||||
currif->option[currif->n_options].name = xstrdup(firstword);
|
||||
currif->option[currif->n_options].value = xstrdup(buf_ptr);
|
||||
debug_noise("\t%s=%s\n", first_word, rest_of_line);
|
||||
currif->option[currif->n_options].name = xstrdup(first_word);
|
||||
currif->option[currif->n_options].value = xstrdup(rest_of_line);
|
||||
currif->n_options++;
|
||||
break;
|
||||
case MAPPING:
|
||||
#if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
||||
if (strcmp(firstword, "script") == 0) {
|
||||
if (strcmp(first_word, "script") == 0) {
|
||||
if (currmap->script != NULL)
|
||||
bb_error_msg_and_die("duplicate script in mapping \"%s\"", buf);
|
||||
currmap->script = xstrdup(next_word(&buf_ptr));
|
||||
} else if (strcmp(firstword, "map") == 0) {
|
||||
currmap->script = xstrdup(next_word(&rest_of_line));
|
||||
} else if (strcmp(first_word, "map") == 0) {
|
||||
if (currmap->n_mappings >= currmap->max_mappings) {
|
||||
currmap->max_mappings = currmap->max_mappings * 2 + 1;
|
||||
currmap->mapping = xrealloc(currmap->mapping, sizeof(char *) * currmap->max_mappings);
|
||||
currmap->mapping = xrealloc(currmap->mapping,
|
||||
sizeof(char *) * currmap->max_mappings);
|
||||
}
|
||||
currmap->mapping[currmap->n_mappings] = xstrdup(next_word(&buf_ptr));
|
||||
currmap->mapping[currmap->n_mappings] = xstrdup(next_word(&rest_of_line));
|
||||
currmap->n_mappings++;
|
||||
} else {
|
||||
bb_error_msg_and_die("misplaced option \"%s\"", buf);
|
||||
@ -817,7 +845,8 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
|
||||
}
|
||||
}
|
||||
free(buf);
|
||||
}
|
||||
} /* while (fgets) */
|
||||
|
||||
if (ferror(f) != 0) {
|
||||
/* ferror does NOT set errno! */
|
||||
bb_error_msg_and_die("%s: I/O error", filename);
|
||||
@ -955,58 +984,37 @@ static int iface_down(struct interface_defn_t *iface)
|
||||
}
|
||||
|
||||
#if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
||||
static int popen2(FILE **in, FILE **out, char *command, ...)
|
||||
static int popen2(FILE **in, FILE **out, char *command, char *param)
|
||||
{
|
||||
va_list ap;
|
||||
char *argv[11] = { command };
|
||||
int argc;
|
||||
char *argv[3] = { command, param, NULL };
|
||||
int infd[2], outfd[2];
|
||||
pid_t pid;
|
||||
|
||||
argc = 1;
|
||||
va_start(ap, command);
|
||||
while ((argc < 10) && (argv[argc] = va_arg(ap, char *))) {
|
||||
argc++;
|
||||
}
|
||||
argv[argc] = NULL; /* make sure */
|
||||
va_end(ap);
|
||||
|
||||
if (pipe(infd) != 0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (pipe(outfd) != 0) {
|
||||
close(infd[0]);
|
||||
close(infd[1]);
|
||||
return 0;
|
||||
}
|
||||
xpipe(infd);
|
||||
xpipe(outfd);
|
||||
|
||||
fflush(NULL);
|
||||
switch (pid = fork()) {
|
||||
pid = fork();
|
||||
|
||||
switch (pid) {
|
||||
case -1: /* failure */
|
||||
close(infd[0]);
|
||||
close(infd[1]);
|
||||
close(outfd[0]);
|
||||
close(outfd[1]);
|
||||
return 0;
|
||||
bb_perror_msg_and_die("fork");
|
||||
case 0: /* child */
|
||||
dup2(infd[0], 0);
|
||||
dup2(outfd[1], 1);
|
||||
close(infd[0]);
|
||||
/* NB: close _first_, then move fds! */
|
||||
close(infd[1]);
|
||||
close(outfd[0]);
|
||||
close(outfd[1]);
|
||||
xmove_fd(infd[0], 0);
|
||||
xmove_fd(outfd[1], 1);
|
||||
BB_EXECVP(command, argv);
|
||||
exit(127);
|
||||
default: /* parent */
|
||||
_exit(127);
|
||||
}
|
||||
/* parent */
|
||||
close(infd[0]);
|
||||
close(outfd[1]);
|
||||
*in = fdopen(infd[1], "w");
|
||||
*out = fdopen(outfd[0], "r");
|
||||
close(infd[0]);
|
||||
close(outfd[1]);
|
||||
return pid;
|
||||
}
|
||||
/* unreached */
|
||||
}
|
||||
|
||||
static char *run_mapping(char *physical, struct mapping_defn_t *map)
|
||||
{
|
||||
@ -1016,12 +1024,8 @@ static char *run_mapping(char *physical, struct mapping_defn_t * map)
|
||||
|
||||
char *logical = xstrdup(physical);
|
||||
|
||||
/* Run the mapping script. */
|
||||
pid = popen2(&in, &out, map->script, physical, NULL);
|
||||
|
||||
/* popen2() returns 0 on failure. */
|
||||
if (pid == 0)
|
||||
return logical;
|
||||
/* Run the mapping script. Never fails. */
|
||||
pid = popen2(&in, &out, map->script, physical);
|
||||
|
||||
/* Write mappings to stdin of mapping script. */
|
||||
for (i = 0; i < map->n_mappings; i++) {
|
||||
@ -1034,9 +1038,9 @@ static char *run_mapping(char *physical, struct mapping_defn_t * map)
|
||||
/* If the mapping script exited successfully, try to
|
||||
* grab a line of output and use that as the name of the
|
||||
* logical interface. */
|
||||
char *new_logical = xmalloc(MAX_INTERFACE_LENGTH);
|
||||
char *new_logical = xmalloc_getline(out);
|
||||
|
||||
if (fgets(new_logical, MAX_INTERFACE_LENGTH, out)) {
|
||||
if (new_logical) {
|
||||
/* If we are able to read a line of output from the script,
|
||||
* remove any trailing whitespace and use this value
|
||||
* as the name of the logical interface. */
|
||||
@ -1047,10 +1051,6 @@ static char *run_mapping(char *physical, struct mapping_defn_t * map)
|
||||
|
||||
free(logical);
|
||||
logical = new_logical;
|
||||
} else {
|
||||
/* If we are UNABLE to read a line of output, discard our
|
||||
* freshly allocated memory. */
|
||||
free(new_logical);
|
||||
}
|
||||
}
|
||||
|
||||
@ -1062,12 +1062,13 @@ static char *run_mapping(char *physical, struct mapping_defn_t * map)
|
||||
|
||||
static llist_t *find_iface_state(llist_t *state_list, const char *iface)
|
||||
{
|
||||
unsigned short iface_len = strlen(iface);
|
||||
unsigned iface_len = strlen(iface);
|
||||
llist_t *search = state_list;
|
||||
|
||||
while (search) {
|
||||
if ((strncmp(search->data, iface, iface_len) == 0)
|
||||
&& (search->data[iface_len] == '=')) {
|
||||
&& (search->data[iface_len] == '=')
|
||||
) {
|
||||
return search;
|
||||
}
|
||||
search = search->link;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user